(under subclass 45) Apparatus and methods wherein coated surfaces or masses are employed to which some of the components of the mixture of solids adhere while others do not.
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171, for flotation processes and apparatus in which an oil which has a selective affinity for some of the constituent of the mixtures to be separated.
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55, Gas Separation, appropriate subclasses beginning with
474, for the separation of solids from gases by filters which may be coated.
252, Compositions, 60+, 88.1, and 88.2 for physical separation agents and for
